Ito model



PATENTED FEB. 23, 1904.

N. POULSON.

FIREPROOF DOOR. APPLIOATION FILED Nov. 20, 1903 2' SHEETS-SHEET 1.

N0 MODEL.

WITNESSES.-

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- No. 753,210. PATENTED FEB. 3; 1904.

'N. POULSON. 'FIIREPROOF DOOR.

APPLICATION FILED NOV. 20 1903.

-N0 HOD IL. 2 SHEETS-SHEET 2.

UNITED STATES Patented February 23, 1904.

PATENT OFFICE.

VNIELS FOUL-SON, on NEW YORK, N. Y.

FIREPFIOOF DOOR.

srnorrron'rron forming part of Letters Patent No. 753,210, dated February 23, 1904.

V useful Improvement in Fireproof Doors, of

which the following is a specification.

This invention relates to the construction of fireproof doors for fireproof buildings; and its leading object is to provide for the construction of a door that will be as nearly indestructible by heat" and water as may be practicable and at the same time capable of artistic ornamentation and as elaborate as may be desired.

Other objects of the present invention are to facilitate neatly constructing such doors and securely fastening the parts together by wood-screws, as hereinafter more particularly set forth.

The invention consists in certain novel combinations of parts, which may be and have been embodied in one and the same door of such construction, as hereinafter specified and claimed.

Two sheets of drawings accompany this specification as part thereof.

Figures 1 and 2 of the drawings are respectively cross-sections of composite fireproof doors constructed in whole or in part according to the present invention. Fig. 3 is asectional perspective view illustrating the production by electrolysis of one of the metallic faoings hereinafter described. Fig. 4: is a sectional perspective view of the same facing provided with its backing. I

Like letters of reference refer to like parts in all the figures.

In both species represented by the drawings one feature of the improved. door is a hollow frame 6, of drawn metal, as brass or bronze,

of the desired shape and dimensions, the members of said frame being substantially T-shaped in crosssection,with the perpendicular leg of the T open-ended and directed inward toward the middle of the door, forming an open inner edge. Another feature common to both species is a filling f, of fireproof material, and preferably of the material known as lignolith, consisting of a composition of fibrous material-such as excelsior, cocoanut fiber, or

Divided and this application filed November 20, 1903. Serial (No model.)

the likewith oxid of manganese and chlorid of manganese in suitable proportions, the same being mixed with water to the consists ency of a paste and permitted to harden in site, said frame 6 being in all cases solidly filled therewith through its open inner edge. Another feature common to both species is a metallic facing h, forming one side of the door, which may be termed its face, andattached to andsupported by said frame c, the attaching devices consisting, preferably and conveniently, of wood -screws c', inserted through holes in the near side of said openedged portion of said frame 6 into the filling f within said frame. Such filling, being of lignolith, as aforesaid, is adapted to afford a good hold for the screw-threads, so that the screws will be as secure as if screwed into ordinary wood. The metallic facing (represented at has an ornamental body portion,which is readily made as elaborate as may be desired, the facing as a whole being produced by electrodeposition. V

The method of production is illustrated by Fig. 3. A wax mold is prepared having on its face the reverse of the desired design. For a has-relief or cameo design, for example, the face of the wax mold isintaglio. This face is metallized by a coating of graphite, upon which the metal of the facing 71. (or 1') is -de-- posited in an electroplating-bath with the surface of thefacing next to the wax. When the facing h (or 1') is sufiiciently thick, it is stripped off the wax mold and is then ready for use. Its rim is subsequently provided with the necessary screw-holes. (Shown in Fig. 4c.) Very handsome effects may thus be obtained without great cost, and accuracy in fitting or adjusting the parts is. at the same time secured.

In the species represented by Fig. 1 both sides of the improved door are provided with such facings, shown, respectively, at 72 and j, the facing being preferably and conveniently structurally artistic and ornate,like the facing h, and formed in like manner by electrodeposition and attached in like manner to the frame 6 by wood-screws 5. According to this species, Fig. 1, a preferred method of building up the door is to first fill the frame 6 itself with the filling f, so that the same shall not extend across the central portion of the structure. This central portion is left open until the filling f within the frame 6 is set. One of the facings-the facing h, for exafnpleafter having a backing 7c, of fireproof material, as lignolith, applied thereto in plastic condition, as in Fig. at, is then put on the frame 6 and fastened in place by the screws 71. The other facing, j, having been provided with a like backing is, is then applied and fastened in place in like manner. In thus assembling the parts a space Z may be left between the portions of backing is and k, which allows an accurate adjustment of the parts and prevents any interference of the backings with each other.

According to another way of building up a composite door with metallic facings on. both sides, as shown in Fig. 1, instead of forming the facings h and j with backings k and k and then applying them to the frame 6 I may first secure one facing, h, to the frame in any suitable manner, then fill in the frame with fireproof material, as lignolith, extending entirely across from one side to the other, and then apply the other facing, j, and fasten the same in place. In this instance no space Z is provided nor is any necessary in the fireproof filling; but the filling forms one entire solid mass.

frame by means of rivets or the like.

In the species represented by Fig. 2 the improved door is made in the manner last described,with the second facing, Fig. 1, omitted, the exposed surface of the lignolith filling f being itself capable of receiving a suitable finish.

In building up doors of either species, Fig. 1 or Fig. 2, the frame 6, including the middle of the door, may first be completely filled with the fireproof material and the metallic facing or facings then applied and fastened in place by the screws z' and i, so as to obviate any necessity for first securing the facing to tlI1e 11 either case a simple and strong fireproof door is produced, adaptedto be readily made of ornate appearance and possessing great ability to withstand fire and water with little tendency to bend or warp and without liability to burn or crack.

In either species suitable hinges a may be attached in any known or improved way.

It will be understood that the term backing has been used for parts of that which is generically the filling of the door in both species. The term lignolith will be used in my claims to mean the specific composition of matter hereinbefore indicated or any equivalent composition adapted to be used as a filling in the manner and for the purposes set forth.

Without limiting myself to the precise construction shown and described, I claim and 5 to and provided with a backing of lignolith,

substantially as described.

7 2. A door, comprising a frame filled with lignolith and a metallic facing backed with lignolith and connected to the frame by screws having their hold in the filling of the frame, substantially as described. r

3. A door, comprising a hollow metallic frame filled with lignolith, and a metallic facing applied externally to said frame and fastened in place by screws havingtheir hold in the filling of said frame, substantially as described.

4:. A door, comprising a hollow metallic frame the members of which are substantially T-shaped in cross-section with an open inner edge, a filling of lignolith Within said frame, and a metallic facing applied externally to the open-edged thin portion of said frame and fastened in place by screws having their hold in the filling of said frame, substantially as described.

5. A door, comprising a hollow metallic frame the membersof which are substantially T-shaped in cross-section with an open inner edge, a filling of lignolith within said frame, and a metallic facing provided with a backing of lignolith, applied externally to the openedged thin portion of said frame and fastened in place by screws having their hold in the filling of said frame, substantially as described.

6. A door, comprising a hollow metallic frame the members of which are substantially T-shaped in cross-section with an open inner edge, a filling of lignolith within said frame,

and a facing of electrodeposited metal provided with a facing of lignolith, applied externally to the open-edged thin portion of said frame and fastened in place by screws having their hold in the filling of said frame, substantially as described.

7. A fireproof door, consisting of a hollow metallic frame, the members of which are substantially T-shaped in cross-section with an open inner edge, a filling of lignolith within said frame, and metallic facings provided with backings of lignolith applied to the respective sides of said frame and fastened in place by screws having their hold in the filling of said frame, substantially as described.

8. A fireproof door consisting of a casing in whole or part of electrodeposited metal, and a filling of lignolith, substantially as described.

NIELS POULSON.

Witnesses:

JAs. L. EWIN, E. Tnos. LOFTUS. 

